By Brian Cazeneuve Who will win in Beijing? SI’s expert predicts the podium for all 109 events at the Winter Games. Less than six months after the Summer Games in Tokyo, athletes will trade spikes, skateboards and swim caps for skates, snowboards and ski goggles, as the Olympics return for the winter edition in Beijing. Below, Sports Illustrated contributor Brian Cazeneuve predicts the winner for each gold, silver and bronze medal that will be awarded in 109 events on snow and ice, starting on Feb. 4 and running through Feb. 20. ALPINE SKIINGMENDOWNHILL Gold: Aleksander Aamodt Kilde (Norway)Si…